The US Air Force is conducting market research to identify potential sources for engineering services to support the AN/ALR-69A Radar Warning Receiver (RWR) system. The system is a digital RWR with specialized hardware designed to detect, identify, and report Radio Frequency (RF) threats. The scope of work includes software and firmware support, integration and merging of software changes, investigation of system performance anomalies, systems engineering, software engineering, testing, and generation of required technical documentation. The contract strategy is anticipated to be a five-year contract with one basic year and four option years. • The AN/ALR-69A system requires sustainment and engineering services to support the complete system. • The system's performance is heavily dependent on its software and firmware, including its Operational Flight Program (OFP), digital signal processing programs, and the Mission Data Files (MDFs) used for threat identification. • The contractor shall furnish all test tools, information systems, support equipment required to provide engineering services support for this effort. • The contractor is responsible for producing, providing, maintaining, and calibrating all support equipment required at their facility or a subcontractor’s facility.